Reenforced-wire-drawing block



PatentedJune 16, 1925.

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To all whom it may concern-2 Be it knownthat ILCHARLES, H. OsLUNn, a citizen of the United States, residing at I Vorcester, in the county of IVorcester and State of Massachusetts, have invented a new and useful Reenforced-Vvire-Drawing Block, of which the following is a specification.

As at present constructed, wire drawing blocks, both the drawing through and the winding blocks, are formed of cast 11011.

The surface at the bottom of. the wire re ceiving portion of the drum receives an eX- cessive amount of wear. so far as I am aware, the usual method of reducing wear on this surface has been to try to chill it in the mold so as to increase its hardness. This is open to many objections as it tends to make the casting brittle and has not been of very great success in'this industry. The object of this invention is to provide a better means of securing a harder surface at the point of excessive wear in drums of the kind above mentioned.

Reference 1s to be had to the accompanying drawings, in which Fig. 1 is a sideview of a drawing through drum constructed in accordance with this invention shown partly in radial section;

Fig. 2 is a sectional view on the line 2-2 of Fig. 1,'and

Fig. 3 is a sectional view on-the line 33 of Fig. 1.

r I have shown the invention as applied to an ordinary drawing through drum 10 but it is capable of being applied to the winding drum without change. I have-shown the drum as-one of the usual shape. In mak ng it, I either cut or cast an annular groove 11 all the way around the drum at the point at which the maximum wear occurs, namely the top of the concave curve. I make this groove of uniform width around the drum and of only a small depth, in some cases a 16th of an inch. I also provide a perforation 12 through the drum and throughout the width of this groove at one point and round off the edges of the perforation.

I then prepare a flexible band 13 of hardened steel of substantially the same. dimensions as the groove 11. I pass this around the drum in the groove and pass the two ends into the perforation 12 so they extend inside. I then place angle irons 14 on opposite sides of these two ends and fix them firmly together by bolts 15 or otherwise.

Tl u gh the "of the angle f ir'oris place screws 16 and screwv th'eirr up to fliea'r on the inside" of jt-he -di'um "and then -'-ti-gliten them up, as shown in Fig. 2, until the band is tight all around the drum and its outer surface is flush with the surface of the drum 10 both above and below it.

In this way I provide a steel wearing surface which will outlast the ordinary cast iron surface many times over and furthermore it is removable and replaceable by another band of steel whenever it does get worn. Thus the whole drum does not have to be thrown away or even taken out of the wire drawing machine and trued up.

mum wear occurs and may be either wider or narrower than in the drawings. It is wide enough to cover the entire area of maximum wear. The band is held firmly in position in the simple. way indicated and the operation of the machine is not likely to cause it to become loose, butifit does, it can be tightened very easily by means of the screws 16.

Although I have illustrated and described only a single form of the invention I am aware of the fact that modifications can be made therein by any person skilled in the art without departing from the scope of the invention as expressed in the claims. Therefore, I do not wish to be limited to the exact details herein shown or to the use of it, on a drawing through drum instead of a winding drum, but what I do claim is 1. As an article of manufacture, a drum for a wire drawing machine of cast iron and having a circumferential groove located at the top of the concave curve thereof which receives the wire first and a hardened steel layer located in said groove to sustain the greatest wear the drum having an uninterrupted surface above said layer and continuous therewith for receiving the wire.

2. As an article of manufacture, a wire drawing drum of cast iron having a circumferential groove located at the pointof maximum wear and hardened steel located in fixed position in said groove to sustain the greatest wear, said hardened steel being flush with, the surface of the drum adjacent thereto.

3; As an article of manufacture, a wire drawing drum having a groove surrounding it near the base of the wire receiving surface and a perforation through it at a point along the groove and provided with a band of hardened metal located in said groove and having its ends extending inwardly through said perforation and fixed together inside the drum;

4. The combination with a Wire drawing drum having a groove surrounding it near the base of the wire receiving surface and a perforation through it at a point along the groove, of a flexible band of hardened steel located in said groove and having its ends extending inwardly through said perforation and in contact with each other inside the drum, a pair of clamps on opposite sides of the two ends of the band of steel inside the drum for holding them together, and screws extending through said clamps and engaging the inner surface ofthe drum for forcing the two ends of the band inward]; and bringing the band to taut condition throughout the circumference of the drum.

In testimony whereof I have hereunto affixed my signature.

' CHARLES H. OSLUND. 

